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P72x/EN FT/C21
User Guide
Page 24/38
MiCOM P721/P723
2.7.2
Phase protection configuration
2.7.2.1
Submenu [87] Phase differential protection (P723 only)
PROTECTION G1
[87] Phase diff protection
Heading of the phase differential current protection
submenu (“[87] Phase diff protection”).
[87] Phase diff
prot? No
Setting choice: Yes or No
Yes: the [87] Phase differential current protection is
enabled. The following menus are displayed.
No: the [87] Phase differential current protection is not
enabled, and no menu is displayed.
[87] Threshold
I diff=
1 In
This menu is displayed when current input selection is
configured.
It sets the value for the phase current differential
threshold, from 0.02In up to 2In (step 0.01In)
[87] Threshold
V diff=
200.0V
This menu is displayed when voltage input selection is
configured.
it sets the value for the phase voltage differential
threshold, from 1V to 400V (step 0.1V)
[87] Flt Timer
t Diff
0s
The fault timer tDiff sets the time delayed phase
differential protection threshold. The setting range is
from 0s to 2s (step 10ms).
[87] Check Zone?
No
Setting choice: Yes or No
Yes: the check zone trip permission (logic input) is
enabled,
No: the check zone is disabled.
[87] Rst Timer
tReset= 0s
The Reset timer menu sets the reset time, from 0 to
600s (step 10ms)
[87] Measure
Filter Sample
The measurement filter is used to select sample mode,
fast sample mode or Fourier mode for threshold
detection.
Setting choice: sample, fast sample or Fourier mode.
2.7.2.2
Submenu [95] Phase bus-wire supervision (P723 only)
PROTECTION G1
[95] Phase bus-wire
supervision
Heading of the phase high impedance differential current
supervision submenu (“[87N] Phase diff protection”).
[95] Phase bus-wire
sup? No
Setting choice: Yes or No
Yes: the [95] Phase high impedance differential
protection is enabled. The following menus are
displayed.
No: the [95] Phase high impedance differential protection
is not enabled, and no menu is displayed.
[95] Threshold
I Sup=
1 In
This menu is displayed when current input selection is
configured.
It sets the value for the phase current high impedance
differential threshold, from 0.02In up to 2In (step 0.01In)
[95] Threshold
V Sup=
400.0V
This menu is displayed when voltage input selection is
configured.
it sets the value for the phase voltage high impedance
differential threshold, from 1V to 400V (step 0.1V)
Содержание P721
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